Sorry to hear about your trouble. While I don’t have any personal experience to draw from (my QH is an easy, peasy All-Around guy, and my warmbloods were always on the more excitable side :-D), there is an article in our Horse Health Library that might be helpful: http://bit.ly/182rVBk
If you have questions about specific supplements, I recommend reaching out to our Customer Care team. They’re really knowledgeable, and always happy to help!
Good luck, and have a great ride! – SmartPaker Sarah
Rider, Runner, Stuff-Riders-Say-er, SmartPaker